CVE-2008-3801: Cisco IOS

High severity, CVSS 7.1. EPSS: 3.2% chance of exploitation in the next 30 days.

Unspecified vulnerability in the Session Initiation Protocol (SIP) implementation in Cisco IOS 12.2 through 12.4 and Unified Communications Manager 4.1 through 6.1, when VoIP is configured, allows remote attackers to cause a denial of service (device or process reload) via unspecified valid SIP messages, aka Cisco Bug ID CSCsm46064, a different vulnerability than CVE-2008-3800 and CVE-2008-3802.

Affected products

• Cisco IOS: version 12.2 only; version 12.3 only; version 12.4 only
• Cisco Unified Callmanager: version 4.1 only; version 4.2 only; version 4.3 only
• Cisco Unified Communications Manager: version 4.1 only; version 5.0 only; version 5.1 only; version 6.1 only

Published 2008-09-26. Last modified 2026-06-16.